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SAMPLING DISTRIBUTION The manufacturer of a new compact car claims the miles per gallon (mpg) for...
The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline...
The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 24.6 mpg and a standard deviation of 9.5 mpg. If 30 such cars are tested, what is the probability the average mpg achieved by these 30 cars will be greater than 28?
The manufacturer of a new car claims that miles per gallon for the gas consumption is...
The manufacturer of a new car claims that miles per gallon for the gas consumption is normally distributed with a mean of 25.9 mpg and a standard deviation of 3.1 mpg. a.) If one car is tested, what is the probability that the mean mpg is less than 24 mpg? b.) If 30 cars are tested, what is the probability that the mean mpg is less than 24 mpg? c.) If one car is tested, what is the probability that...
An automobile manufacturer claims that their car has a 56.7 miles/gallon (MPG) rating. An independent testing...
An automobile manufacturer claims that their car has a 56.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car. After testing 14 cars they found a mean MPG of 56.6 with a standard deviation of 1.1. Is there sufficient evidence at the 0.1 level that the cars underperform the manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses. Answer 2 Points...
2. An automobile manufacturer claims that their leading compact car averages 36 mpg in the city....
2. An automobile manufacturer claims that their leading compact car averages 36 mpg in the city. The population standard deviation is 8 mpg for city driving. Suppose a city police department purchases 64 cars from this auto manufacturer. If these cars were driven exclusively under city conditions and averaged 34 mpg, can one argue that the manufacturer's claim is too high at 1%. a. State the null and alternative hypothesis b. Determine and draw the hypothesis test model (Label everything)...
2. An automobile manufacturer claims that their leading compact car averages 36 mpg in the city....
2. An automobile manufacturer claims that their leading compact car averages 36 mpg in the city. The population standard deviation is 8 mpg for city driving. Suppose a city police department purchases 64 cars from this auto manufacturer. If these cars were driven exclusively under city conditions and averaged 34 mpg, can one argue that the manufacturer's claim is too high at 1%. a. State the null and alternative hypothesis b. Determine and draw the hypothesis test model (Label everything)...
Under specified conditions, an automobile manufacturer is concerned about the miles per gallon (mpg) of its...
Under specified conditions, an automobile manufacturer is concerned about the miles per gallon (mpg) of its new compact car. For cars of the same class, the average is 23 with a standard deviation of 5 mpg. To investigate, the manufacturer tested 28 cars in which the average was 19 mpg. What can the car manufacturer conclude with α = 0.05? a) Compute the corresponding effect size(s) and indicate magnitude(s). If not appropriate, input and select "na" below. d = ______...
An automobile manufacturer claims that its car has a 33.7 miles/gallon (MPG) rating. An independent testing...
An automobile manufacturer claims that its car has a 33.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car since it is believed that the car has an incorrect manufacturer's MPG rating. After testing 120 cars, they found a mean MPG of 34.0. Assume the variance is known to be 2.56. A level of significance of 0.02 will be used. Find the value of the test statistic. Round your answer to 2...
A car company claims that its compact model gets 33 miles per gallon. A government inspector...
A car company claims that its compact model gets 33 miles per gallon. A government inspector tests 12 of the company cars and finds that the average mileage is 29.9 mpg with a standard deviation of 1.2 mpg. Test if the mileage found is significantly less than the mileage claimed by the company using = 0.01.
A car company claims that its compact model gets 31 miles per gallon. A government inspector...
A car company claims that its compact model gets 31 miles per gallon. A government inspector tests 38 of the company cars and finds that the average mileage is 29.7 mpg with a standard deviation of 2.2 mpg. Test if the mileage found is significantly less than the mileage claimed by the company using α = 0.01. (show bell shaped graph)
An automobile manufacturer claims that their van has a 38.7 miles/gallon (MPG) rating. An independent testing...
An automobile manufacturer claims that their van has a 38.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van. After testing 13 vans they found a mean MPG of 38.2 with a standard deviation of 1.7. Is there sufficier evidence at the 0.025 level that the vans underperform the manufacturer's MPG rating? Assume the population distribution is approximately normal Step 4 of 5: Determine the decision rule for rejecting the null hypothesis....
An automobile manufacturer claims that their car has a 56.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this car. After testing 14 cars they found a mean MPG of 56.6 with a standard deviation of 1.1. Is there sufficient evidence at the 0.1 level that the cars underperform the manufacturer's MPG rating? Assume the population distribution is approximately normal. Step 1 of 5: State the null and alternative hypotheses. Answer 2 Points...
2. An automobile manufacturer claims that their leading compact car averages 36 mpg in the city. The population standard deviation is 8 mpg for city driving. Suppose a city police department purchases 64 cars from this auto manufacturer. If these cars were driven exclusively under city conditions and averaged 34 mpg, can one argue that the manufacturer's claim is too high at 1%. a. State the null and alternative hypothesis b. Determine and draw the hypothesis test model (Label everything)...
2. An automobile manufacturer claims that their leading compact car averages 36 mpg in the city. The population standard deviation is 8 mpg for city driving. Suppose a city police department purchases 64 cars from this auto manufacturer. If these cars were driven exclusively under city conditions and averaged 34 mpg, can one argue that the manufacturer's claim is too high at 1%. a. State the null and alternative hypothesis b. Determine and draw the hypothesis test model (Label everything)...
An automobile manufacturer claims that their van has a 38.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this van. After testing 13 vans they found a mean MPG of 38.2 with a standard deviation of 1.7. Is there sufficier evidence at the 0.025 level that the vans underperform the manufacturer's MPG rating? Assume the population distribution is approximately normal Step 4 of 5: Determine the decision rule for rejecting the null hypothesis....
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